Melanoleuca alboflavida (Peck) Murrill 1914
White and yellow Melanoleuca. Cap disc is slightly darker, often exhibiting a knob within a depression when fully expanded. Fairly large mushroom with very close and crowded white gills. Spores are white. Appears in spring through fall. This is a saprotrophic mushroom. Considered edible.
The names we use for this genus in North America are European and probably consist of different species.